Add a "fork" of musl as //fusl.

fusl/include/sys/socket.h

+#ifndef _SYS_SOCKET_H
+#define _SYS_SOCKET_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <features.h>
+
+#define __NEED_socklen_t
+#define __NEED_sa_family_t
+#define __NEED_size_t
+#define __NEED_ssize_t
+#define __NEED_uid_t
+#define __NEED_pid_t
+#define __NEED_gid_t
+#define __NEED_struct_iovec
+
+#include <bits/alltypes.h>
+
+#include <bits/socket.h>
+
+#ifdef _GNU_SOURCE
+struct ucred
+{
+        pid_t pid;
+        uid_t uid;
+        gid_t gid;
+};
+
+struct mmsghdr
+{
+        struct msghdr msg_hdr;
+        unsigned int  msg_len;
+};
+
+struct timespec;
+
+int sendmmsg (int, struct mmsghdr *, unsigned int, unsigned int);
+int recvmmsg (int, struct mmsghdr *, unsigned int, unsigned int, struct timespec *);
+#endif
+
+struct linger
+{
+        int l_onoff;
+        int l_linger;
+};
+
+#define SHUT_RD 0
+#define SHUT_WR 1
+#define SHUT_RDWR 2
+
+#ifndef SOCK_STREAM
+#define SOCK_STREAM    1
+#define SOCK_DGRAM     2
+#endif
+
+#define SOCK_RAW       3
+#define SOCK_RDM       4
+#define SOCK_SEQPACKET 5
+#define SOCK_DCCP      6
+#define SOCK_PACKET    10
+
+#ifndef SOCK_CLOEXEC
+#define SOCK_CLOEXEC   02000000
+#define SOCK_NONBLOCK  04000
+#endif
+
+#define PF_UNSPEC       0
+#define PF_LOCAL        1
+#define PF_UNIX         PF_LOCAL
+#define PF_FILE         PF_LOCAL
+#define PF_INET         2
+#define PF_AX25         3
+#define PF_IPX          4
+#define PF_APPLETALK    5
+#define PF_NETROM       6
+#define PF_BRIDGE       7
+#define PF_ATMPVC       8
+#define PF_X25          9
+#define PF_INET6        10
+#define PF_ROSE         11
+#define PF_DECnet       12
+#define PF_NETBEUI      13
+#define PF_SECURITY     14
+#define PF_KEY          15
+#define PF_NETLINK      16
+#define PF_ROUTE        PF_NETLINK
+#define PF_PACKET       17
+#define PF_ASH          18
+#define PF_ECONET       19
+#define PF_ATMSVC       20
+#define PF_RDS          21
+#define PF_SNA          22
+#define PF_IRDA         23
+#define PF_PPPOX        24
+#define PF_WANPIPE      25
+#define PF_LLC          26
+#define PF_IB           27
+#define PF_CAN          29
+#define PF_TIPC         30
+#define PF_BLUETOOTH    31
+#define PF_IUCV         32
+#define PF_RXRPC        33
+#define PF_ISDN         34
+#define PF_PHONET       35
+#define PF_IEEE802154   36
+#define PF_CAIF         37
+#define PF_ALG          38
+#define PF_NFC          39
+#define PF_VSOCK        40
+#define PF_MAX          41
+
+#define AF_UNSPEC       PF_UNSPEC
+#define AF_LOCAL        PF_LOCAL
+#define AF_UNIX         AF_LOCAL
+#define AF_FILE         AF_LOCAL
+#define AF_INET         PF_INET
+#define AF_AX25         PF_AX25
+#define AF_IPX          PF_IPX
+#define AF_APPLETALK    PF_APPLETALK
+#define AF_NETROM       PF_NETROM
+#define AF_BRIDGE       PF_BRIDGE
+#define AF_ATMPVC       PF_ATMPVC
+#define AF_X25          PF_X25
+#define AF_INET6        PF_INET6
+#define AF_ROSE         PF_ROSE
+#define AF_DECnet       PF_DECnet
+#define AF_NETBEUI      PF_NETBEUI
+#define AF_SECURITY     PF_SECURITY
+#define AF_KEY          PF_KEY
+#define AF_NETLINK      PF_NETLINK
+#define AF_ROUTE        PF_ROUTE
+#define AF_PACKET       PF_PACKET
+#define AF_ASH          PF_ASH
+#define AF_ECONET       PF_ECONET
+#define AF_ATMSVC       PF_ATMSVC
+#define AF_RDS          PF_RDS
+#define AF_SNA          PF_SNA
+#define AF_IRDA         PF_IRDA
+#define AF_PPPOX        PF_PPPOX
+#define AF_WANPIPE      PF_WANPIPE
+#define AF_LLC          PF_LLC
+#define AF_IB           PF_IB
+#define AF_CAN          PF_CAN
+#define AF_TIPC         PF_TIPC
+#define AF_BLUETOOTH    PF_BLUETOOTH
+#define AF_IUCV         PF_IUCV
+#define AF_RXRPC        PF_RXRPC
+#define AF_ISDN         PF_ISDN
+#define AF_PHONET       PF_PHONET
+#define AF_IEEE802154   PF_IEEE802154
+#define AF_CAIF         PF_CAIF
+#define AF_ALG          PF_ALG
+#define AF_NFC          PF_NFC
+#define AF_VSOCK        PF_VSOCK
+#define AF_MAX          PF_MAX
+
+#ifndef SO_DEBUG
+#define SO_DEBUG        1
+#define SO_REUSEADDR    2
+#define SO_TYPE         3
+#define SO_ERROR        4
+#define SO_DONTROUTE    5
+#define SO_BROADCAST    6
+#define SO_SNDBUF       7
+#define SO_RCVBUF       8
+#define SO_KEEPALIVE    9
+#define SO_OOBINLINE    10
+#define SO_NO_CHECK     11
+#define SO_PRIORITY     12
+#define SO_LINGER       13
+#define SO_BSDCOMPAT    14
+#define SO_REUSEPORT    15
+#define SO_PASSCRED     16
+#define SO_PEERCRED     17
+#define SO_RCVLOWAT     18
+#define SO_SNDLOWAT     19
+#define SO_RCVTIMEO     20
+#define SO_SNDTIMEO     21
+#define SO_ACCEPTCONN   30
+#define SO_SNDBUFFORCE  32
+#define SO_RCVBUFFORCE  33
+#define SO_PROTOCOL     38
+#define SO_DOMAIN       39
+#endif
+
+#define SO_SECURITY_AUTHENTICATION              22
+#define SO_SECURITY_ENCRYPTION_TRANSPORT        23
+#define SO_SECURITY_ENCRYPTION_NETWORK          24
+
+#define SO_BINDTODEVICE 25
+
+#define SO_ATTACH_FILTER        26
+#define SO_DETACH_FILTER        27
+#define SO_GET_FILTER           SO_ATTACH_FILTER
+
+#define SO_PEERNAME             28
+#define SO_TIMESTAMP            29
+#define SCM_TIMESTAMP           SO_TIMESTAMP
+
+#define SO_PEERSEC              31
+#define SO_PASSSEC              34
+#define SO_TIMESTAMPNS          35
+#define SCM_TIMESTAMPNS         SO_TIMESTAMPNS
+#define SO_MARK                 36
+#define SO_TIMESTAMPING         37
+#define SCM_TIMESTAMPING        SO_TIMESTAMPING
+#define SO_RXQ_OVFL             40
+#define SO_WIFI_STATUS          41
+#define SCM_WIFI_STATUS         SO_WIFI_STATUS
+#define SO_PEEK_OFF             42
+#define SO_NOFCS                43
+#define SO_LOCK_FILTER          44
+#define SO_SELECT_ERR_QUEUE     45
+#define SO_BUSY_POLL            46
+#define SO_MAX_PACING_RATE      47
+#define SO_BPF_EXTENSIONS       48
+#define SO_INCOMING_CPU         49
+#define SO_ATTACH_BPF           50
+#define SO_DETACH_BPF           SO_DETACH_FILTER
+
+
+#ifndef SOL_SOCKET
+#define SOL_SOCKET      1
+#endif
+
+#define SOL_IP          0
+#define SOL_IPV6        41
+#define SOL_ICMPV6      58
+
+#define SOL_RAW         255
+#define SOL_DECNET      261
+#define SOL_X25         262
+#define SOL_PACKET      263
+#define SOL_ATM         264
+#define SOL_AAL         265
+#define SOL_IRDA        266
+
+#define SOMAXCONN       128
+
+#define MSG_OOB       0x0001
+#define MSG_PEEK      0x0002
+#define MSG_DONTROUTE 0x0004
+#define MSG_CTRUNC    0x0008
+#define MSG_PROXY     0x0010
+#define MSG_TRUNC     0x0020
+#define MSG_DONTWAIT  0x0040
+#define MSG_EOR       0x0080
+#define MSG_WAITALL   0x0100
+#define MSG_FIN       0x0200
+#define MSG_SYN       0x0400
+#define MSG_CONFIRM   0x0800
+#define MSG_RST       0x1000
+#define MSG_ERRQUEUE  0x2000
+#define MSG_NOSIGNAL  0x4000
+#define MSG_MORE      0x8000
+#define MSG_WAITFORONE 0x10000
+#define MSG_CMSG_CLOEXEC 0x40000000
+
+#define __CMSG_LEN(cmsg) (((cmsg)->cmsg_len + sizeof(long) - 1) & ~(long)(sizeof(long) - 1))
+#define __CMSG_NEXT(cmsg) ((unsigned char *)(cmsg) + __CMSG_LEN(cmsg))
+#define __MHDR_END(mhdr) ((unsigned char *)(mhdr)->msg_control + (mhdr)->msg_controllen)
+
+#define CMSG_DATA(cmsg) ((unsigned char *) (((struct cmsghdr *)(cmsg)) + 1))
+#define CMSG_NXTHDR(mhdr, cmsg) ((cmsg)->cmsg_len < sizeof (struct cmsghdr) ? (struct cmsghdr *)0 : \
+        (__CMSG_NEXT(cmsg) + sizeof (struct cmsghdr) >= __MHDR_END(mhdr) ? (struct cmsghdr *)0 : \
+        ((struct cmsghdr *)__CMSG_NEXT(cmsg))))
+#define CMSG_FIRSTHDR(mhdr) ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr) ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) 0)
+
+#define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) & (size_t) ~(sizeof (size_t) - 1))
+#define CMSG_SPACE(len) (CMSG_ALIGN (len) + CMSG_ALIGN (sizeof (struct cmsghdr)))
+#define CMSG_LEN(len)   (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
+
+#define SCM_RIGHTS      0x01
+#define SCM_CREDENTIALS 0x02
+
+struct sockaddr
+{
+        sa_family_t sa_family;
+        char sa_data[14];
+};
+
+struct sockaddr_storage
+{
+        sa_family_t ss_family;
+        unsigned long __ss_align;
+        char __ss_padding[128-2*sizeof(unsigned long)];
+};
+
+int socket (int, int, int);
+int socketpair (int, int, int, int [2]);
+
+int shutdown (int, int);
+
+int bind (int, const struct sockaddr *, socklen_t);
+int connect (int, const struct sockaddr *, socklen_t);
+int listen (int, int);
+int accept (int, struct sockaddr *__restrict, socklen_t *__restrict);
+int accept4(int, struct sockaddr *__restrict, socklen_t *__restrict, int);
+
+int getsockname (int, struct sockaddr *__restrict, socklen_t *__restrict);
+int getpeername (int, struct sockaddr *__restrict, socklen_t *__restrict);
+
+ssize_t send (int, const void *, size_t, int);
+ssize_t recv (int, void *, size_t, int);
+ssize_t sendto (int, const void *, size_t, int, const struct sockaddr *, socklen_t);
+ssize_t recvfrom (int, void *__restrict, size_t, int, struct sockaddr *__restrict, socklen_t *__restrict);
+ssize_t sendmsg (int, const struct msghdr *, int);
+ssize_t recvmsg (int, struct msghdr *, int);
+
+int getsockopt (int, int, int, void *__restrict, socklen_t *__restrict);
+int setsockopt (int, int, int, const void *, socklen_t);
+
+int sockatmark (int);
+
+#ifdef __cplusplus
+}
+#endif
+#endif